![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAA90lEQVQoU41RsXHDMAx8sKBaZQOPog3sEawKVKcR7A3UkaykDaJMkIzgDeINkloFkYNO0tGKcxdWBPAP/j8JuxNC6AAciagEMFhrr3Vdf68wyvExxkFEShFptU9ESr475+Z67u0IYq19WTf2fV9O0/TFzBtuu3jvD8aYz3yoy2KM8pSwDD8AjMysUhR8AVAxc/WXpBOAVxG5Lx4OKaW6aZrhF0EN6zYAXUrppgBjjNZnEXl3ztWbae/9mYjaoiiqPEIFLMZvKaWLvjSbjjGq9o6Zx/2/LHOV2qqXlfCQxJ6Ux/svQh7vTAghjER0fCZn7YnIm3Pu9AOP9nwNp+NeJQAAAABJRU5ErkJggg==)
孤狼 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAYAAABy6+R8AAABM0lEQVQoU41RwXHCQAyUjsHDkw6ggzgdOB2QDuBj2a+4g5AOkted+AAdUILTgVNBXAJPjxmkjDyQgYRA9NLtabUrCeEkmHkrInGe5/URvoThYrGIVfUZACanDS7kFQC8ENEGQwgbRFzZg5kVEe/TNLWCLo7Yfr/fOufKKIpiNJCI0Aq89+NTa4aZk2MTZi5FZN6RVLW8Ya37RsRYRB47kog8/JP0qqrFt73lcjnc7XZ3/X7/o2maYa/XG6Vp+m72bB6zfWbPZmJm216BiIWqWp4QUWKFAFAS0fwXyZTatn2KouitaZrYOTciorX3fgoAdZ7n5Z9KIjJ1zk1VNc6ybHI4SXWmFEKozM7PVV9aDDPXIpKg9z5xzq1U9fPGBseIuDbF7qiHwybXSIPBoJrNZlur+QKBmNUDeGA2LgAAAABJRU5ErkJggg==)
2023-08-10 |
程序开发 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAABIklEQVQoU3WRzXHCQAyF9XTwGTpIKohLMBWEdGAuyHuCEuggcLLXJzqIUwF0EEqgg3D2QcrI42VgILpoVqtPP0+gfyzGuCGiFYDZcrk8pTQ8y2+aZkgA8KaqryGE8wMQY5wTUT5+lFmW5X3f/4rIXdHhUdf1CzP/ENGEiE6qugsh7GOM5h2YeaOqR48NQIxx797MLgBWqjoLIRx9NDPbMnNJRFsR6RJwVtXSk+q6LtyPhdZmVhDRGcBERMoEWJZl08VicbkVwUcF4FDHzF8iMr0CaYxnqnlXZj64AAPQNE0H4CQirv2D+U3MLK+qap5U8goOFbdHcrJt29zMDqr64btdNR4vuyaiTwDD0uPCHtul7ndH8Vl9SQDvI/DtsibVPPYH+E6eDYX/dnMAAAAASUVORK5CYII=)
2331°C
是的,最近又有一个项目用到了Python,这回也顺便总结一下虚拟环境的用法吧。以后方便查阅。
Python
虚拟环境
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAA90lEQVQoU41RsXHDMAx8sKBaZQOPog3sEawKVKcR7A3UkaykDaJMkIzgDeINkloFkYNO0tGKcxdWBPAP/j8JuxNC6AAciagEMFhrr3Vdf68wyvExxkFEShFptU9ESr475+Z67u0IYq19WTf2fV9O0/TFzBtuu3jvD8aYz3yoy2KM8pSwDD8AjMysUhR8AVAxc/WXpBOAVxG5Lx4OKaW6aZrhF0EN6zYAXUrppgBjjNZnEXl3ztWbae/9mYjaoiiqPEIFLMZvKaWLvjSbjjGq9o6Zx/2/LHOV2qqXlfCQxJ6Ux/svQh7vTAghjER0fCZn7YnIm3Pu9AOP9nwNp+NeJQAAAABJRU5ErkJggg==)
孤狼 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAYAAABy6+R8AAABM0lEQVQoU41RwXHCQAyUjsHDkw6ggzgdOB2QDuBj2a+4g5AOkted+AAdUILTgVNBXAJPjxmkjDyQgYRA9NLtabUrCeEkmHkrInGe5/URvoThYrGIVfUZACanDS7kFQC8ENEGQwgbRFzZg5kVEe/TNLWCLo7Yfr/fOufKKIpiNJCI0Aq89+NTa4aZk2MTZi5FZN6RVLW8Ya37RsRYRB47kog8/JP0qqrFt73lcjnc7XZ3/X7/o2maYa/XG6Vp+m72bB6zfWbPZmJm216BiIWqWp4QUWKFAFAS0fwXyZTatn2KouitaZrYOTciorX3fgoAdZ7n5Z9KIjJ1zk1VNc6ybHI4SXWmFEKozM7PVV9aDDPXIpKg9z5xzq1U9fPGBseIuDbF7qiHwybXSIPBoJrNZlur+QKBmNUDeGA2LgAAAABJRU5ErkJggg==)
2023-07-19 |
原创作品 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAABIklEQVQoU3WRzXHCQAyF9XTwGTpIKohLMBWEdGAuyHuCEuggcLLXJzqIUwF0EEqgg3D2QcrI42VgILpoVqtPP0+gfyzGuCGiFYDZcrk8pTQ8y2+aZkgA8KaqryGE8wMQY5wTUT5+lFmW5X3f/4rIXdHhUdf1CzP/ENGEiE6qugsh7GOM5h2YeaOqR48NQIxx797MLgBWqjoLIRx9NDPbMnNJRFsR6RJwVtXSk+q6LtyPhdZmVhDRGcBERMoEWJZl08VicbkVwUcF4FDHzF8iMr0CaYxnqnlXZj64AAPQNE0H4CQirv2D+U3MLK+qap5U8goOFbdHcrJt29zMDqr64btdNR4vuyaiTwDD0uPCHtul7ndH8Vl9SQDvI/DtsibVPPYH+E6eDYX/dnMAAAAASUVORK5CYII=)
2440°C
要下载文件,网速慢,预计需要10小时,但是不想等下载完了还开着机,经常忘记关NAS。于是,就有了这个玩意。
定时
关机
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAA90lEQVQoU41RsXHDMAx8sKBaZQOPog3sEawKVKcR7A3UkaykDaJMkIzgDeINkloFkYNO0tGKcxdWBPAP/j8JuxNC6AAciagEMFhrr3Vdf68wyvExxkFEShFptU9ESr475+Z67u0IYq19WTf2fV9O0/TFzBtuu3jvD8aYz3yoy2KM8pSwDD8AjMysUhR8AVAxc/WXpBOAVxG5Lx4OKaW6aZrhF0EN6zYAXUrppgBjjNZnEXl3ztWbae/9mYjaoiiqPEIFLMZvKaWLvjSbjjGq9o6Zx/2/LHOV2qqXlfCQxJ6Ux/svQh7vTAghjER0fCZn7YnIm3Pu9AOP9nwNp+NeJQAAAABJRU5ErkJggg==)
孤狼 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAYAAABy6+R8AAABM0lEQVQoU41RwXHCQAyUjsHDkw6ggzgdOB2QDuBj2a+4g5AOkted+AAdUILTgVNBXAJPjxmkjDyQgYRA9NLtabUrCeEkmHkrInGe5/URvoThYrGIVfUZACanDS7kFQC8ENEGQwgbRFzZg5kVEe/TNLWCLo7Yfr/fOufKKIpiNJCI0Aq89+NTa4aZk2MTZi5FZN6RVLW8Ya37RsRYRB47kog8/JP0qqrFt73lcjnc7XZ3/X7/o2maYa/XG6Vp+m72bB6zfWbPZmJm216BiIWqWp4QUWKFAFAS0fwXyZTatn2KouitaZrYOTciorX3fgoAdZ7n5Z9KIjJ1zk1VNc6ybHI4SXWmFEKozM7PVV9aDDPXIpKg9z5xzq1U9fPGBseIuDbF7qiHwybXSIPBoJrNZlur+QKBmNUDeGA2LgAAAABJRU5ErkJggg==)
2023-07-03 |
程序开发 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAABIklEQVQoU3WRzXHCQAyF9XTwGTpIKohLMBWEdGAuyHuCEuggcLLXJzqIUwF0EEqgg3D2QcrI42VgILpoVqtPP0+gfyzGuCGiFYDZcrk8pTQ8y2+aZkgA8KaqryGE8wMQY5wTUT5+lFmW5X3f/4rIXdHhUdf1CzP/ENGEiE6qugsh7GOM5h2YeaOqR48NQIxx797MLgBWqjoLIRx9NDPbMnNJRFsR6RJwVtXSk+q6LtyPhdZmVhDRGcBERMoEWJZl08VicbkVwUcF4FDHzF8iMr0CaYxnqnlXZj64AAPQNE0H4CQirv2D+U3MLK+qap5U8goOFbdHcrJt29zMDqr64btdNR4vuyaiTwDD0uPCHtul7ndH8Vl9SQDvI/DtsibVPPYH+E6eDYX/dnMAAAAASUVORK5CYII=)
1878°C
上面一篇文章说了我使用了PHP的文件锁来制作了一个事务隔离。有些朋友说可以使用for update直接实现。于是去找了一些for update的资料,发现其中有一个点一直被他们说错了。于是就有了这篇文章。
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAA90lEQVQoU41RsXHDMAx8sKBaZQOPog3sEawKVKcR7A3UkaykDaJMkIzgDeINkloFkYNO0tGKcxdWBPAP/j8JuxNC6AAciagEMFhrr3Vdf68wyvExxkFEShFptU9ESr475+Z67u0IYq19WTf2fV9O0/TFzBtuu3jvD8aYz3yoy2KM8pSwDD8AjMysUhR8AVAxc/WXpBOAVxG5Lx4OKaW6aZrhF0EN6zYAXUrppgBjjNZnEXl3ztWbae/9mYjaoiiqPEIFLMZvKaWLvjSbjjGq9o6Zx/2/LHOV2qqXlfCQxJ6Ux/svQh7vTAghjER0fCZn7YnIm3Pu9AOP9nwNp+NeJQAAAABJRU5ErkJggg==)
孤狼 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAYAAABy6+R8AAABM0lEQVQoU41RwXHCQAyUjsHDkw6ggzgdOB2QDuBj2a+4g5AOkted+AAdUILTgVNBXAJPjxmkjDyQgYRA9NLtabUrCeEkmHkrInGe5/URvoThYrGIVfUZACanDS7kFQC8ENEGQwgbRFzZg5kVEe/TNLWCLo7Yfr/fOufKKIpiNJCI0Aq89+NTa4aZk2MTZi5FZN6RVLW8Ya37RsRYRB47kog8/JP0qqrFt73lcjnc7XZ3/X7/o2maYa/XG6Vp+m72bB6zfWbPZmJm216BiIWqWp4QUWKFAFAS0fwXyZTatn2KouitaZrYOTciorX3fgoAdZ7n5Z9KIjJ1zk1VNc6ybHI4SXWmFEKozM7PVV9aDDPXIpKg9z5xzq1U9fPGBseIuDbF7qiHwybXSIPBoJrNZlur+QKBmNUDeGA2LgAAAABJRU5ErkJggg==)
2023-07-02 |
程序开发 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAABIklEQVQoU3WRzXHCQAyF9XTwGTpIKohLMBWEdGAuyHuCEuggcLLXJzqIUwF0EEqgg3D2QcrI42VgILpoVqtPP0+gfyzGuCGiFYDZcrk8pTQ8y2+aZkgA8KaqryGE8wMQY5wTUT5+lFmW5X3f/4rIXdHhUdf1CzP/ENGEiE6qugsh7GOM5h2YeaOqR48NQIxx797MLgBWqjoLIRx9NDPbMnNJRFsR6RJwVtXSk+q6LtyPhdZmVhDRGcBERMoEWJZl08VicbkVwUcF4FDHzF8iMr0CaYxnqnlXZj64AAPQNE0H4CQirv2D+U3MLK+qap5U8goOFbdHcrJt29zMDqr64btdNR4vuyaiTwDD0uPCHtul7ndH8Vl9SQDvI/DtsibVPPYH+E6eDYX/dnMAAAAASUVORK5CYII=)
2139°C
最近在做一个任务管理平台,其中又一个业务是定时请求任务,由于业务逻辑和服务器性能原因不太适合做socket连接,所以采用的是定时请求方式获取数据。这直接造成了间歇性小并发。于是就带来了一些mysql脏读的问题。
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAA90lEQVQoU41RsXHDMAx8sKBaZQOPog3sEawKVKcR7A3UkaykDaJMkIzgDeINkloFkYNO0tGKcxdWBPAP/j8JuxNC6AAciagEMFhrr3Vdf68wyvExxkFEShFptU9ESr475+Z67u0IYq19WTf2fV9O0/TFzBtuu3jvD8aYz3yoy2KM8pSwDD8AjMysUhR8AVAxc/WXpBOAVxG5Lx4OKaW6aZrhF0EN6zYAXUrppgBjjNZnEXl3ztWbae/9mYjaoiiqPEIFLMZvKaWLvjSbjjGq9o6Zx/2/LHOV2qqXlfCQxJ6Ux/svQh7vTAghjER0fCZn7YnIm3Pu9AOP9nwNp+NeJQAAAABJRU5ErkJggg==)
孤狼 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAYAAABy6+R8AAABM0lEQVQoU41RwXHCQAyUjsHDkw6ggzgdOB2QDuBj2a+4g5AOkted+AAdUILTgVNBXAJPjxmkjDyQgYRA9NLtabUrCeEkmHkrInGe5/URvoThYrGIVfUZACanDS7kFQC8ENEGQwgbRFzZg5kVEe/TNLWCLo7Yfr/fOufKKIpiNJCI0Aq89+NTa4aZk2MTZi5FZN6RVLW8Ya37RsRYRB47kog8/JP0qqrFt73lcjnc7XZ3/X7/o2maYa/XG6Vp+m72bB6zfWbPZmJm216BiIWqWp4QUWKFAFAS0fwXyZTatn2KouitaZrYOTciorX3fgoAdZ7n5Z9KIjJ1zk1VNc6ybHI4SXWmFEKozM7PVV9aDDPXIpKg9z5xzq1U9fPGBseIuDbF7qiHwybXSIPBoJrNZlur+QKBmNUDeGA2LgAAAABJRU5ErkJggg==)
2023-05-25 |
程序开发 |
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAABIklEQVQoU3WRzXHCQAyF9XTwGTpIKohLMBWEdGAuyHuCEuggcLLXJzqIUwF0EEqgg3D2QcrI42VgILpoVqtPP0+gfyzGuCGiFYDZcrk8pTQ8y2+aZkgA8KaqryGE8wMQY5wTUT5+lFmW5X3f/4rIXdHhUdf1CzP/ENGEiE6qugsh7GOM5h2YeaOqR48NQIxx797MLgBWqjoLIRx9NDPbMnNJRFsR6RJwVtXSk+q6LtyPhdZmVhDRGcBERMoEWJZl08VicbkVwUcF4FDHzF8iMr0CaYxnqnlXZj64AAPQNE0H4CQirv2D+U3MLK+qap5U8goOFbdHcrJt29zMDqr64btdNR4vuyaiTwDD0uPCHtul7ndH8Vl9SQDvI/DtsibVPPYH+E6eDYX/dnMAAAAASUVORK5CYII=)
3189°C
最近一个项目要用到VS,对,就是VS,没有code。又要写C#了,哎。不过现在免费版倒是很不错,比之前一直找破解版好多了。说回正题,写好了代码发现一直不运行,于是开始输出信息调试,emmm,为啥不显示,找了一圈都是各种改来改去,就是没人说原因,最后才找到一个说明原因的。